fix(tui): stop re-asking action when launcher already picked Export/Import

Same missing-passthrough bug as the earlier tenant re-prompt fix, this time
for -Action: Start-IntuneManagementTui.ps1 always showed the
Export/Import/DeployCISBaseline/GenerateReports picker even when the
launcher's menu items 1/2 had already decided it. Launcher now passes
-Action through, TUI skips the prompt when supplied.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Start-IntuneToolkit.ps1

@@ -385,13 +385,14 @@ while($true)
 
     # Clear any mode-specific params from previous loop iteration
     $commonParams.Remove("Interactive")
+    $commonParams.Remove("Action")
     $commonParams.Remove("Mode")
     $commonParams.Remove("WhatIf")
 
     switch($choiceNumber)
     {
-        1 { $commonParams.Interactive = $true }
-        2 { $commonParams.Interactive = $true }
+        1 { $commonParams.Interactive = $true; $commonParams.Action = "Export" }
+        2 { $commonParams.Interactive = $true; $commonParams.Action = "Import" }
         5 { $commonParams.Mode = "Backup" }
         6 { $commonParams.Mode = "Restore" }
         11 { $commonParams.WhatIf = $true }